From a farming family in Norfolk, Jack van Poortvliet attended Tigers Rugby Camps at North Walsham RFC before joining the club’s developing player programme and then entering the academy system.
Originally a fly-half, Jack moved to scrum-half and played in back-to-back Under-18 League title-winning squads with Tigers in 2017/18 and 2018/19.
The 2018/19 campaign also featured a first experience of senior rugby in the Premiership Shield and appearances for England Under-18s for the Oakham School student.
He made his senior debut for the club at the start of 2019/20 and a first Premiership start at Sale Sharks before his 19th birthday among five first-team appearances in that campaign.
Jack is the son of Jeff van Poortvliet who played for Saracens in the early 1990 and the scrum-half also captained Oakham age group sides and the 1st XV.
He was included in the 2021 England squad for the u20 Six Nations.
In February 2020, van Poortvliet made his full Premiership debut in a 36–3 defeat to Sale Sharks at the AJ Bell Stadium in Salford.
He enjoyed a breakout season with Leicester Tigers in 2021/21 featuring in 19 of Leicester's 26 Premiership matches as the Club went on to win the competition finishing every round on top of the table and winning the title.
He captained Leicester for the first time on 13 November 2021, in a 32-23 Premiership Rugby Cup win against Sale Sharks.
In June 2022 van Poortvliet received his first call-up to the senior England squad by coach Eddie Jones.He made his debut for England on 2 July 2022, scoring a consolation try as England lost 30–28 to Australia in Perth, Australia.
In September 2022 van Poortvliet extended his contract at Leicester.
Ahead of the Rugby World Cup 2023, van Poortvliet has been named in the squad for England.
S.C June 2023
|2019 - present|
|2020 - 2022|
|2022 - 2023|